DTC 22, App No. 1 Circuit Low (Models With Pcm): Notes

Accelerator Pedal Position (APP) module provides a voltage signal that changes relative to accelerator position. There are 3 sensors located within APP module that are scaled differently. DTC 22 will set when voltage is less than .25 volt for 2 seconds on APP No. 1 sensor.

PCM will default to input from APP No. 1 sensor being ignored. A current and history DTC will set but will not turn on SERVICE THROTTLE SOON light. Throttle will operate normally as long as there is only one sensor malfunctioning. If 2 different APP sensors have a malfunction, SERVICE THROTTLE SOON light will light and PCM will limit power. If 3 APP sensors malfunction, SERVICE THROTTLE SOON light will light and PCM will only allow engine to operate at idle.

1. This step determines if DTC 22 is result of a hard failure or an intermittent condition.
2. This step checks PCM and wiring.
3. This step checks for a faulty connection or sensor.
4. This step checks ground circuit.